Kubuntu is just Ubuntu with the KDE desktop environment. It's not a beta of Ubuntu. Ndiswrapper will work with any distro in principle.

To find out how to use it, I suggest you google a bit for something like "ndiswrapper howto". Basically, ndiswrapper wraps around the Windoze drivers, and makes them emulate a Linux driver. You don't get everything (like the very low level monitor stuff etc.), but you get everything to make your adapter work for normal circumstances.